125321431 has 4 divisors (see below), whose sum is σ = 125373664. Its totient is φ = 125269200.

The previous prime is 125321401. The next prime is 125321459. The reversal of 125321431 is 134123521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125321431 - 2⁷ = 125321303 is a prime.

It is a super-2 number, since 2×125321431² = 31410922135775522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125321401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22335 + ... + 27376.

It is an arithmetic number, because the mean of its divisors is an integer number (31343416).

Almost surely, 2^125321431 is an apocalyptic number.

125321431 is a deficient number, since it is larger than the sum of its proper divisors (52233).

125321431 is an equidigital number, since it uses as much as digits as its factorization.

125321431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52232.

The product of its digits is 720, while the sum is 22.

The square root of 125321431 is about 11194.7054896500. The cubic root of 125321431 is about 500.4282078381.

Adding to 125321431 its reverse (134123521), we get a palindrome (259444952).

The spelling of 125321431 in words is "one hundred twenty-five million, three hundred twenty-one thousand, four hundred thirty-one".